I have noticed that too. I ask to make sure I can make sure his space needs are fulfilled. I don't want to buy something and put it in an environment too small. All about research and asking experts (=

I have gotten answers from 4' X 6' X 4' all the way to what you described now. As far as lizards go, there is almost no enclosure too big!

My main concern was the co-existence with other iguanas. My boy (green) has a 11' X 10' room with lots of shelves. I was curious if they would be fine together in that space with separate food/basking/hiding.